Wearables
Oura Ring 4
Oura
Smart ring from Oura that tracks sleep, activity, heart rate and HRV, temperature trends and blood oxygen, with insights in the Oura app (iOS and Android). Titanium, with up to 5-8 days of battery per Oura. Oura Ring 5, a smaller successor, launched in May 2026 (see Oura Ring 5); Ring 4 is still sold. Price (checked Oct 3, 2026): Silver and Stealth $349; Gold $399; Oura Ring 4 Ceramic $399 (Stealth, Gold and Ceramic were shown marked down from higher list prices). Oura Membership costs $5.99/month or $69.99/year in the US (first month free for new members) and unlocks most insights. US members with an active membership can also order Oura Health Panels, a 50-biomarker Quest blood test, in the Oura app (usually $99; not available in every state). HSA/FSA eligible. Directory: Wearables & Tracking > Smart rings.
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